Kevin Adler

Kevin Adler is the deuteragonist of Infinite Fight series (formerly known as Movie Project School Thing) and the third season of Zero Tolerance. Kevin is the cousin of Nate and had always cared for him, but he had somehow left him twice, first for an unknown reason, the second was due to his aunt, Lisa, forcing him to leave Kane County. He is also Andrew's first friend after several years and had been getting along well, despite the two having almost entirely polar opposites, where their arguments could be shown in season 2.5.

Personality
In season 1, he didn't seem to care about his surroundings, in a very contrast to Andrew's attitude. It can also be said that Kevin didn't seem to trust most people in the society as he described while being pushed to the corner by Armin.

However, he did have considerations about others as he implied that he didn't want his burden to be brought upon others no matter what. He's also willing not to fight back because he thought that doing that will only make him more like the bullies.

In season 2, however, it's revealed that Kevin's been in an "injustified" crimes such as killing his own step-aunt and stealing from the mysterious stranger's family (which might explain why he didn't want to let his burdens being brought to someone else back in season 1), in which those crimes might have haunted him most of the time and at the same time, made him a very "anti-social" person due to his misdeeds years ago.

And ever since the end of season 2, he had always been on a comedic side way more often (probably due to Adam's behavior of jokes), as he could be seen in Zero Tolerance: The Hunting and Sporty Crime Part 2.

Just like his cousin Nate, he knew how terrible killing was and the moment the mysterious guy could have been killed, he chose not to (despite being put in another danger afterwards).

Due to him having his cousin back, and also able to make a truce with Armin, which everyone thought would be impossible, he had become much more serious and determined. He's also shown to have a "dumber" side of himself in the end of season 2 (where he knew Deadpool's real name) and part 1 of Zero Tolerance: The Hunting (where he couldn't fish and had a fight with Armin, who's no different in that sport too).

Pre-MPST
Kevin's used to visit his cousin Nate, and he was considered as a considerate person. But somehow along the way, he started to change at the age of 6 (according to Nate). He left Nate when he was 9, and at some point, Kevin killed his step-aunt as it was between his or her death. When he escaped, he was starved, and found foods in the car, and at least than half of the total.

After the escape, he met his aunt, Lisa at some point and lived happily there. He was homeschooled for several years, but in the mid of 2017, he was asked to go to Kane County to start socializing and was reunited with his cousin Nate. But he was forced by his aunt to leave, due to unknown reason (probably because of the Superintendent's whereabouts).

"New Student"
Kevin entered the class with little to no expression at all. When he was asked to introduce himself in front of the class, he faked his last name with "Chandra", to the point where Hansen made fun of him by saying his relation to Bong Chandra (in real life, he's a motivator). He was being laughed by half of the class, the other half such as Andrew stayed silent. Ms. Kyle, however stopped the laugh when she hurt Hansen. She allowed Kevin to continue, and he did so. Thus he returned to his seat. Andrew thought of it as an empty expressson.

"Class Brawl #01"
Kevin thought that ms. Kyle's exactly like his aunt, serious but also kind. When she called out Kevin's name for the Integral question, Kevin went to the front while the others expected Kevin to fail. When he succeeded in answering the question, Hansen tried to throw the paper ball to Kevin but Kevin easily dodged it, causing Hansen himself to got in trouble for being a jerk. Armin, who found himself losing one friend, saw Kevin as a person responsible for it.

"Class Brawl #02"
Armin questioned Kevin for creating an unnecessary misunderstanding. Kevin only ignored Armin until he swiped Kevin's stuffs from the table, making Kevin's attentios undivided towards Armin. As Armin tried to insult Kevin really hard, it only made Kevin taunted him back for fun, causing Kevin to be pushed against the wall. But by the time it happened, Armin made a second thought about doing things such as drugs or chicks, to no avail - that caused Armin to became more enraged as he got taunted more and more (especially being called one of those bad people out there), causing him to smash Kevin's head to the wall several times and put him to the ground. Kevin almost lost his life, but Andrew managed to stop Armin from doing any further than that. He was left unconscious afterwars, leaving Andrew and Adam to carry him to the clinic.

"Friendship"
Kevin woke up in the clinic, with some of the bandages around him. Doctor Crane warned him to stay out of that fight, which Kevin made fun of. When Andrew and Kevin left the clinic, Andrew questioned his actions not being out of the room. Kevin also stated that he didn't want to hurt anyone or he'll end up like Armin or other bullies out there. Andrew convinced Kevin, desperately but successfully, and thus, creating a friendship between the two. The episode ended up with Kevin calling him "son of a b***h" (reference to the handshake in "Predator").

Lisa Adler
It can be assumed that Kevin and aunt Lisa had a great relationship as aunt and nephew. However, during the time Kevin was forced to get out of Kane County, Kevin was mad at his aunt for doing so, and presumably, the relationship had gotten deteriorated. It's unknown to whether they had improved their connections with each other between the events after Zero Tolerance and before MPST.

Lilly Adler
Kevin lived with his mother Lilly for around 9 years. Nobody had ever described how their connections, but it can be assumed that they're very close to each other.

Nate
Kevin and Nate had a great cousin relationship in the early years, as Nate described Kevin as somewhat considerate. But Kevin left Nate for unknown reasons, leaving him confused. It's unknown with how the relationship could go when they were re-united in Kane County. It's confirmed, however, that Nate had a hostile attitude towards Kevin for leaving him twice.

When Kevin saw Nate hurting the mysterious guy, he was even willing to shout to him about killing him (or so he thought). However, despite both of them being hostile for certain reasons, they expressed how much they missed each other, proving that they still had a stable relationship.

Andrew Shaw
The first time Andrew saw Kevin, Kevin didn't even pay attention to him or anyone due to his distrust. Everything changed when Kevin was almost killed by Armin in the class, causing Andrew to step-up. After ms. Kyle saved both Andrew and Kevin, Andrew talked to Kevin regarding Kevin's attitude towards the external threat. Andrew wanted to make sure Kevin's okay, and convinced him about friendship, which Kevin replied in a funny but convincing manner.

In season 2, they didn't interact much, but it can be assumed that Andrew is still friends with Kevin, despite Andrew being a bit suspicious whether he would had lvest Kevin the same way he lost Josh years ago.

Armin
Kevin and Armin have a very rough interaction from the start of the series until the middle of season 2. It started with Armin just making fun of Kevin for the heck of it, but unlike others, Kevin seemed to ignore it like a boss, which pissed Armin off. When Hansen left the friendship circle, Armin was completely enraged and thought it was Kevin who was responsible. When Kevin insulted Armin with his words, he smashed Kevin's head and threw him to the ground, proving that Armin had no sympathy for Kevin or his life.

The same kept on happening in the start of season 2, where Armin didn't want Kevin to join the competition because he thought that Kevin would only make things worse again. This kind of hate caused Armin to be upset that he wanted to beat Kevin himself. Kevin, however, had never shown any kind of hate, but at the same time, he also seemed hostile towards Armin's attitude.

Adam
Kevin and Adam had the same relationship like Armin in season 1, but it quickly changed because Adam had no intention of crazy violence, causing him to change from Armin's side to Kevin's, and thus, befriending him in season 2.

Hansen
Kevin and Hansen had the same relationship like Armin in season 1 - he made fun of Kevin, he even made a joke about Bong Chandra (because Kevin faked his last name "Chandra" rather than saying "Adler). However, it's unknown about what happened to Hansen in season 2, thus, their interactionhavare remained as unknown.

Ms. Kyle
Kevin and ms. Kyle had a stable connection with each other, as Kevin described her as somewhat similar to his own aunt. Ms. Kyle's also concerned with Kevin's past, and cared for him deeply - she even asked Andrew to help Kevin so that he won't have to suffer at any point.

Lucy
Kevin first met Lucy in the hospital, and she started as a bit hostile to him. Kevin didn't seem bothered with the way she talked to him, but the moment she talked with hostility to her dad, Kevin quickly stopped her, a bit furious with what she wanted to do. But as time went by, both of them had a stable friendship. Kevin also trusted her to attack the mysterious guy when he talked, to make sure nobody had to die because of it.

Mysterious Guy
The person who had his stuffs taken by Kevin had hated him for years, and had been observing Kevin until it's the right time to "attack". Kevin also saw him as a dangerous person as he used a gun and also kidnapped Lucy. Kevin even said that he's a monster despiteit didn't look like one, meaning that Kevin didn't judge a book by i's cover, but Kevin could see it by seeing 'something' (in which it had never been confirmed).